User log in to WHM but not to cPanel

An user of my server can access WHM without any problem. But can't log in to cPanel, returning username/password window again. I tried to change the password and still don't work. What can I do to fix this?

An user of my server can access WHM without any problem. But can't log in to cPanel, returning username/password window again. I tried to change the password and still don't work. What can I do to fix this?

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Note that if a user has access both WHM and cPanel that they have the same password to both interfaces. If you modify the password either via the WHM or via the cPanel interface, that reseller password becomes modified for both interfaces.

I would recommend you see if you can duplicate the problem yourself. This could be a client-side issue rather than a server-side issue. However, if you can replicate the issue of being able to access WHM but not cPanel with the same user/pass, submit a support ticket because that is highly abnormal.